Watch-case



l(No Model.) 2 Sheets-Sheet 1.

G. F. MORRILL. WATCH GASP..

No. 372,558. Patented Nov.. 1, 1887'.

(No Mmm.) 2'sheets-sheet 2 C. F. MORRILL.

WATCH CASE. No. 372,558. Patented Nov. l, 1887.

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UNITED STATES PATENT. OFFICE., l

CHARLES F. MORRILL, OF BOSTON, MASSACHUSETTS.

WATCH-CASE.

SPECIFICATION forming pari: of Letters Patent No. 372,558, latedNovember l, 1887.

Application filed May 7, 1887. Serial No. 237,424. (No model.)

T0 all whom it may concern/.-

Be it known that I, CHARLES F. MORRILL, of Boston, in the county ofSuffolk and State of Massachusetts, have invented certain new and usefulImprovements in Watch Gases, of which the following is a specification.

This invention relates to watch cases in which the back, bezel, and likeseparable parts are connected by screw-threads with the casecenter; andit consists in certain improvements, hereinafter described, in theconstruction of this class of cases.

Of the accompanying drawings, forming a part of this specitication,Figure l represents a side elevation of a portion of the center of myimproved case. Fig. 2 represents an enlarged section on line 2 2, Fig.l. Fig. 3 represents a side elevation of the ring which constitutes thethreaded shoulder engaging the ease-back. Fig. 4 represents a section online 4 4, Fig. 3. Fig. 5 represents a side View of the ring whichconstitutes the threaded shoulder engaging the bezel. Fig. 6 representsa section on line 6 G, Fig. 5. Fig. 7 represents a section ofthe threeparts shown in the preceding figures connected and forming thecaseeenter. Fig. 8 represents a side view of the core or ring which isapplied to the back or bezel. Fig. 9 represents a section on line 9 9,Fig. 8. Fig. 10 represents a sectional view of a portion ot' the bezel.sectional view of a portion of the back. Fig. l2 represents a sideelevation of the complete case. Fig. 13 represents a section on line 1313, Fig. 12.

The same letters of reference indicate the same parts in all thefigures.

In carrying out my invention I construct the case-center in threegeneral parts, 2 3 4, the part 2 being the central or body portion andhaving two internally-threaded shoulders or ianges, c b, andinwardly-projecting seats .sz s2 at the bases of said shoulders. Theparts 3 4 are externally-threaded rings adapted to be screwed into theinternal threads of the shoulders ab, said parts or rings 3 4 beingwider than the threaded surfaces of the shoulders a b, so that theyproject outside of said shoulders,.as shown in Fig. 7, their outerportions constituting externally-threaded shoulders to engagetheinternally-lhreaded portions Fig. 1l represents a' of the back c andbezel d, while their inner edges bear against the seats s? s2.

The rings 3 4 are prevented from turning by l -tion of the back or bezelwhen said parts are so engraved or ornamented as to require that certainparts be in line with the pendant. In screw-cases the threads ot' thebaekand casecenter sometimes become worn, so that eventually the back,when screwed to place, will not have its ornamentation correctly locatedwith reference to the pendant. By making the threaded shoulders of thecase-center adjustable, as described, I entirely overcome thisobjection.

It will be seen that the described construction of the case-center,besides affording the very desirable adj ustability of the threadedshoulders above described, also enables said shoulders to be made ot' aharder metal than that of the main portion 2 ot the case-center, thusmaking the construction more durable; and they have the advantage ofbeing removable from the main portion ofthe case-center,

so that they may bereplaced by new rings if Y their threads becomeunserviceable from wear. There being two rings, each removable independently, one can be removed without disturbing the other, when onlyone ring becomes unservieeable.

In further carrying out my invention T provide the bezel d with a ringor core, 7, internally threaded and placcdin theangle formed within themargin of the bezel, as shown in Fig. 10, the bezel being formed oversaid ring or core by any suitable means.

The internallythreaded surface of the ring or core 7 is formed to screwonto the threaded exterior ofthe ring 4 ofthe case-center. Theinwardly-projecting lip or flange l0 of the bezel terminates in ashoulder, 8, which does not extend inwardly so far as the threaded innersurface of the ring or core 7, and is formed to it closely against theouter side of the flange or shoulder b ofthe case-center, so thatthejoint between the bezel and case'eenter is roo rendered tight andsecure both by the elose 'tit of the shoulder S on the [lange band bythe engagement ot' the threaded inner` surface of the ring or eore 7with the threaded outersurface oi' the ring 4.

rllhe bael; e is provided with a ring or core, 7, similar in allessential particulars to the core 7 ofthe bezel and threaded to screwonto the ring a ofthe ease-renter. The back also has a shoulder, S,formed to lit closely against the outer surlaee of the ilange a of theeasecenter.

rlhe cores 7 7 may be prevented troni turningin the back and bezel byscrews s, as shown in Fig. 13.

It will be seen Ithat the cores 7 may be adjusted like the rings 3 4 ot`the easeeenter, and, like said rings, may be made ol' a harder material.

My invention is not limited to the conjoint use ot' the rings 3 t andeores 7 7, as the threaded portions ofthe back and bezel may be madeintegral therewith, as usual, instead ot'being formed on separate piecesor Cores; or the baelz and bezel,provided with the cores 7 7, may beengaged with serew threaded shoulders, formed, as usual, on the body ot'the easeleenter instead ol' on separable rings.

lt will be seen that the shoulders S 8 on the back and bezel and theshoulders or ilanges a b on the ease-center, eo operating with theshoulders S 8, hold the back and bezel in plaee laterally and preventthem l'roni slipping or wabbling edgewise while the screw-threads ot'the back and bezel are being engaged with those ofthe case-renter.

I claim l. A watch-ease center composed ofa body having aninternally-threaded tlange or shout.

tachable to and detachable troni said body, as set forth.

3. Awateh-ease center composed of the body having the externally smoothand internallythreaded shoulders or tlanges a b, theinwardl yprojectingseats s`l s2, and the externallythreaded rings 3 4, screwed into saidshoulders and p rejecting outside thereof, as set forth.

4. In a watch ease, the center composed ofthe hotly having an externallysmooth and internally-threaded shoulder or llange, as a, and anexternallythreaded ring, as 3, eonr bined with a back or bezel having aninternal screw-thread adapted to engage with the saideXternallythreade-d ring, and a shoulder, 8, formed to tit the externalsurlaee ofthe shoulder or flange a, as set forth.

5. ln a watelrease, the center Composed of the body having theexternally smooth and the interually-threaded shoulders or [langes a b,and the externally-threaded rings 8 it, conibined with the back c andbezel d, internally serewvthreaded and adapted to engage with saidrings, and provided with shoulders 8 8, formed to lit the externalsurlaoes ofthe shoulders a b, as set forth.

6. A wateh easebaek or bezel provided willi an annularinternally*threaded ring or eore, secured to the margin et the back orbezel and bearing against its inner surface, as set l'orth.

7. A watch-ease back or bezel provided with an annularinternally-threaded core and with a shoulder, as S, outside ot' thethreaded sur- 'aee of said core, as set l'orth.

8. A watch-ease composed ofthe three part ease-center, constructed asdescribed, and the back and bezel each provided with aninternally-threaded eore and a shoulder outside of the threaded surfaceof said eore and adapted to engage the ease-Center, as set forth.

ln testimony whereoi'l have signed my name to this speeilieatioinin thepresence of two subscribing witnesses, this 5th day ol' May, A. D. 1887.

CHARLES F. HORRILL.

Vitnesses:

C. F. BROWN, A. D. I-LiRnisoN.

